prominence axis (page-section family)Add the header-emphasis axis from SPEC-107: prominence scales a rune's page-section header (eyebrow / title / blurb / rhythm), selecting its typographic register. Unlike elevation it is not universal — it is available only to runes that carry the page-section header model.
Tracking started Jun 14 — check back for trends.
d3617c0quiet | normal | prominent | display and emit data-prominence.prominence (via a shared attribute preset) only to the page-section-header family — the runes already sharing pageSectionProperties / sections: { preamble, headline, blurb } (recipe, hero, cta, section, feature, budget, cast, comparison, …). Setting it on a non-header rune (e.g. badge) is a validation error with a clear message.defaultProminence to RuneConfig. The skin owns the magnitude (it may clamp/no-op a value); availability is the engine's concern, degree is the theme's.prominence accepts quiet | normal | prominent | display, emitted as data-prominence, on header-family runes only.prominence with a clear validation error; tests cover an allowed + a rejected rune.defaultProminence is read from theme RuneConfig; a hero defaulting to display needs no authored attribute, while a compact hero / display recipe can override.RuneConfig default plumbing).packages/runes/src/tags/common.ts (pageSectionProperties) · packages/runes/src/attribute-presets.ts.